[mdekkers]

Interesting. I have never seen those issues, and have been using MG for quite a few years, for many clients.

[lemming]

I used to use Mailgun for sending out licences for my product. I got a lot of people saying they had never arrived, especially Microsoft addresses and Chinese ones. This continued despite repeated complaints and IP switches. I switched to sending through Fastmail and have never had a problem since.

[user15672]

Same here. I've moved away from paying for a dedicated IP because it seemed a bit redundant.